---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-142735"
form_type: "8-K"
ticker: "RVMD"
cik: "0001628171"
company_name: "Revolution Medicines, Inc."
filed_at: "2025-06-18T23:59:59+00:00"
generated_at: "2026-05-19T03:02:28.542956+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# Revolution Medicines director Barbara Weber resigns ahead of 2025 annual meeting due to Tango collaboration activation

## Summary
- Barbara Weber, M.D., resigned from Revolution Medicines board effective immediately prior to June 26, 2025 annual meeting.
- Resignation triggered by activation of clinical study under collaboration with Tango Therapeutics, not due to any disagreement.
- Dr. Weber also stepped down from Nominating and Corporate Governance Committee and R&D Committee.
- The company has not yet named a replacement for the board vacancy.

## SEC filing metadata
- accession: 0001193125-25-142735
- form_type: 8-K
- ticker: RVMD
- cik: 0001628171
- company_name: Revolution Medicines, Inc.
- filed_at: 2025-06-18T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1628171/000119312525142735/0001193125-25-142735-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1628171/000119312525142735/d935264d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-142735
- JSON: https://secwatch.observer/filing/0001193125-25-142735.json
- Plain text: https://secwatch.observer/filing/0001193125-25-142735.txt

## Key facts
- Executive change
  Barbara Weber, M.D. resigned as Director at Revolution Medicines, Inc..
  - Action: resigned
  - Role: Director
  source text: On June 18, 2025, Barbara Weber, M.D., communicated her decision to resign from the board of directors (the “Board”) of Revolution Medicines, Inc.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1628171/000119312525142735/0001193125-25-142735-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.